Atomically thin dilute magnetism in Co-doped phosphorene

Two-dimensional dilute magnetic semiconductors can provide fundamental insights in the very nature of magnetic orders and their manipulation through electron and hole doping. Despite the fundamental physics, due to the large charge density control capability in these materials, they can be extremely important in spintronics applications such as spin valve and spin-based transistors. In this article, we studied a two-dimensional dilute magnetic semiconductors consisting of phosphorene monolayer doped with cobalt atoms in substitutional and interstitial defects. We show that these defects can be stabilized and are electrically active. Furthermore, by including holes or electrons by a potential gate, the exchange interaction and magnetic order can be engineered, and may even induce a ferromagnetic-to-antiferromagnetic phase transition in p-doped phosphorene.Comment: 7 pages, 4 colorful figure

The relationship between S&T development and (social) science productivity in Europe

This article analyses on a comparative basis, the relationship between S&T development and (social) science productivity in the EU countries. The results reveal that Germany, Netherlands, France and United Kingdom are no longer the leaders in the development of S&T, and the top positions have been taken by Northern European countries namely Finland, Denmark and Sweden. These results could give rise to the reshaping of European leadership in economic and social development, if Germany, France and the United Kingdom do not reverse their S&T investment trends of the past 20 years. The data not only indicate a change in the leading countries, but also the alteration of the positions of other countries in the European Space for Science. With the exception of Greece, Southern European countries have made considerable advances as have Czech Republic and Slovenia. As for (social) science productivity, it has been shown that the countries that are at the top of the S&T hierarchy are not necessarily those that publish most papers in WoS/JCR journals, but rather the contrary. This led to the conclusion that other indicators should be taken in consideration to analyse science productivity, including the orientation of academic reforms and the new models of universities governance. Science productivity is one of the tools used to implement this governance model which tends to manage all disciplines in the same way. Journal data bases are part of this new management and have a decisive role in the stratification of the European and global Science Space

Why firms do not enrol in socio-technical networks empirical evidence from Portugal

The R&D system in Portugal was reorganised using a model designed to improve links with firms in order to facilitate the transfer of knowledge and to improve innovation capacity. In this paper a survey is used as the basis for an analysis on if, why and to what extent firms and other entities linked with each other and how this affected their innovation capacity. Methods of Multiple Correspondence and Cluster analysis were applied. Our discussion of the results led us to question the notion of “transfer of knowledge” and the role of economic theory in the construction of this reality